Hormonal Shifts
This normally affects women. Palpitations can happen during the hormonal changes that accompany pregnancy and menstrual cycles. Palpitations are directly caused [15] by low estrogen levels. A drop in estrogen levels results in an overstimulation of the heart.
Estrogen production becomes extremely low during menopause. In these women, palpitations often happen during hot flashes. The onset is usually sudden and may last only a few seconds.
Conclusion
Heart palpitations are usually not a cause for alarm, although they may be indicative of underlying heart disease. See a doctor if you frequently experience intense heart palpitations with no explainable cause. Avoid alcohol if you already have heart problems as this can aggravate it or put you in life-threatening situations.
References:
[1] https://www.nhs.uk/conditions/heart-palpitations/
[2] https://www.nhs.uk/conditions/heart-palpitations/
[3] https://www.phillymag.com/sponsor-content/exercising-with-heart-flutters-is-it-dangerous
[4] https://www.nhs.uk/conditions/low-blood-sugar-hypoglycaemia
[5] https://www.mentalfloss.com/article/80204/why-does-my-heart-beat-faster-sometimes
[6] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4969023/
[7] https://academic.oup.com/eurheartj/article/38/27/2100/3748448
[8] https://www.ucsf.edu/news/2012/06/98747/alcohol-may-trigger-serious-palpitations-heart-patients
[9] https://www.ucsf.edu/news/2012/06/98747/alcohol-may-trigger-serious-palpitations-heart-patients
[10] https://www.webmd.com/heart-disease/atrial-fibrillation/qa/how-does-caffeine-cause-your-heart-to-skip-a-beat
[11] https://uihc.org/health-topics/understanding-heart-palpitations
[12] https://www.sleepfoundation.org/sleep-deprivation/how-sleep-deprivation-affects-your-heart
[13] https://pubmed.ncbi.nlm.nih.gov/9627158/
[14] https://pubmed.ncbi.nlm.nih.gov/14567523/
[15] https://www.medicalnewstoday.com/articles/317700